Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at s = √7 TeV with the ATLAS experiment
This paper describes an analysis of the angular distribution of W→eν and W→μν decays, using data from pp collisions at s√=7 TeV recorded with the ATLAS detector at the LHC in 2010, corresponding to an integrated luminosity of about 35 pb[superscript −1]. Using the decay lepton transverse momentum a...
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| Format: | Article |
| Language: | en_US |
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Springer-Verlag
2017
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| Online Access: | http://hdl.handle.net/1721.1/106211 https://orcid.org/0000-0002-7586-7253 |
| _version_ | 1826191736514281472 |
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| author | Taylor, Frank E |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Taylor, Frank E |
| author_sort | Taylor, Frank E |
| collection | MIT |
| description | This paper describes an analysis of the angular distribution of W→eν and W→μν decays, using data from pp collisions at s√=7 TeV recorded with the ATLAS detector at the LHC in 2010, corresponding to an integrated luminosity of about 35 pb[superscript −1]. Using the decay lepton transverse momentum and the missing transverse momentum, the W decay angular distribution projected onto the transverse plane is obtained and analysed in terms of helicity fractions f[subscript 0], f[subscript L] and f[subscript R] over two ranges of W transverse momentum (p[superscript W][subscript T]) : 35 < p[superscript W][subscript T] < 50 GeV and p[superscript W][subscript T] > 50 GeV. Good agreement is found with theoretical predictions. For p[superscript W][subscript T] > 50 GeV, the values of f[subscript 0] and f[subscript L]−f[subscript R], averaged over charge and lepton flavour, are measured to be: f[subscript 0]=0.127±0.030±0.108 and f[subscript L]−f[subscript R]=0.252±0.017±0.030, where the first uncertainties are statistical, and the second include all systematic effects. |
| first_indexed | 2024-09-23T09:00:28Z |
| format | Article |
| id | mit-1721.1/106211 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:00:28Z |
| publishDate | 2017 |
| publisher | Springer-Verlag |
| record_format | dspace |
| spelling | mit-1721.1/1062112022-09-30T12:47:28Z Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at s = √7 TeV with the ATLAS experiment Taylor, Frank E Massachusetts Institute of Technology. Department of Physics Taylor, Frank E This paper describes an analysis of the angular distribution of W→eν and W→μν decays, using data from pp collisions at s√=7 TeV recorded with the ATLAS detector at the LHC in 2010, corresponding to an integrated luminosity of about 35 pb[superscript −1]. Using the decay lepton transverse momentum and the missing transverse momentum, the W decay angular distribution projected onto the transverse plane is obtained and analysed in terms of helicity fractions f[subscript 0], f[subscript L] and f[subscript R] over two ranges of W transverse momentum (p[superscript W][subscript T]) : 35 < p[superscript W][subscript T] < 50 GeV and p[superscript W][subscript T] > 50 GeV. Good agreement is found with theoretical predictions. For p[superscript W][subscript T] > 50 GeV, the values of f[subscript 0] and f[subscript L]−f[subscript R], averaged over charge and lepton flavour, are measured to be: f[subscript 0]=0.127±0.030±0.108 and f[subscript L]−f[subscript R]=0.252±0.017±0.030, where the first uncertainties are statistical, and the second include all systematic effects. United States. Dept. of Energy National Science Foundation (U.S.) Brookhaven National Laboratory 2017-01-05T19:50:01Z 2017-01-05T19:50:01Z 2012-05 2012-03 Article http://purl.org/eprint/type/JournalArticle 1434-6044 1434-6052 http://hdl.handle.net/1721.1/106211 The ATLAS Collaboration et al. “Measurement of the Polarisation of W Bosons Produced with Large Transverse Momentum in Pp Collisions at √s = 7 TeV with the ATLAS Experiment.” The European Physical Journal C 72.5 (2012): n. pag. © 2012 CERN for the benefit of the ATLAS collaboration https://orcid.org/0000-0002-7586-7253 en_US http://dx.doi.org/10.1140/epjc/s10052-012-2001-6 The European Physical Journal C Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0/ application/pdf Springer-Verlag Springer |
| spellingShingle | Taylor, Frank E Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at s = √7 TeV with the ATLAS experiment |
| title | Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at s = √7 TeV with the ATLAS experiment |
| title_full | Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at s = √7 TeV with the ATLAS experiment |
| title_fullStr | Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at s = √7 TeV with the ATLAS experiment |
| title_full_unstemmed | Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at s = √7 TeV with the ATLAS experiment |
| title_short | Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at s = √7 TeV with the ATLAS experiment |
| title_sort | measurement of the polarisation of w bosons produced with large transverse momentum in pp collisions at s √7 tev with the atlas experiment |
| url | http://hdl.handle.net/1721.1/106211 https://orcid.org/0000-0002-7586-7253 |
| work_keys_str_mv | AT taylorfranke measurementofthepolarisationofwbosonsproducedwithlargetransversemomentuminppcollisionsats7tevwiththeatlasexperiment |